Lighting-fixture



P. A. BREDSVOLD.

LIGHTING FIXTURE. APPLICATION mm SEPT-4.1917.

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6 SHEETSSHEET 6- [ii/a A y 3 i R 1 W 1 1E 1 g 1 N 0 w A 7 In 3 V W m PAUL A. BREDSVOLD, OF CHICAGO, ILLINOIS, ASST 1. THOMPSON, TWOTWELFTHS 'I'O FRANK M. F

NORINE BREDSVOLD.

LIGHTINGFFIKTURE.

Specification of Letters Patent.

Patented Sept. 7, 1920.

Application filed September 4, 1917. Serial No. 189,594.

To all whom it may concern:

Be it known that I, PAUL A. BREDSVOLD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and use ful Improvements in Lighting-Fixtures, of which the following is a description.

My invention belongs to that general class of devices in which a suitable source of light is employed in connection with a reflector or reflectors to secure the best effect from the light, and prevent, as far as possible, its loss by absorption in the surrounding walls or surfaces. To this end it has for its object broadly the combination of a reflector of novel construction with a suitable source of light, the two being provided with means whereby they may be adjusted relative to one another to secure the most effective results. To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a vertical section through a device embodyin my invention, substantially on line 1-1 0% Fig. 4;

Fig. 2 is a fragmentary section showing a modification of the same;

Fig. 3 is a detailed view;

Fig. 4 is a plan view taken from above, of one form of my improved device;

Fig. 5 is a sectional view showing a modification of the device shown in Fig. 2;

Fi 6 is a section partly in elevation, substantially on line 66 of Fig. 8, showing a modified form;

Fig. 7 is a transverse section taken on line 77 of Fig. 8;

Fig. 8 is a partial plan view from above, showing the detailed construction of the adjusting means of the structures of Figs. 6 and 7;

Fig. 9 is a modified construction of the form shown in Figs. 6, 7 and 8 with parts broken away to show the construction;

Fi 10 is a sectional view of one form of my invention illustratin the device as a unitary structure adapts to be readily attached to any ordinary lamp socket; and

. Fig. 11 is a modification of the form shown in Figs. "5 and 9.

Referring to the drawings, 1 is a reflector for a light fixture, the light member 2 passing centrally therethrough as indicated. 3 is a supplemental reflector maintained in spaced relation to the reflector. 1 by any suitable means, the space between the marginal edges of the two reflectors being unimpeded to permit the escape of light and heat. The two reflectors are preferably circular in outline, although not necessarily so, and when circular, the reflector 3 is annular, with a comparatively large central opening, dependent however, in the full contemplation of my improvement, upon the position of the source of light; thus as shown in Fig. 1, 4 is the film of a nitrogen lamp of well known construction, which is circular in its arrangement and horizontal in position. To secure the full measure of my improvement, this light is so positioned that the rays illustrated by the letterso, b, c, d and 6, pass from the light by the inner edge of the marginal opening of the reflector 8 and strike upon the reflector 1 near its outer marginal edge as indicated. The lower rays of light, which may be indicated by the letters f, g,- h and 2', as well as all the rays between the most outer one as indicated above, and It and f contact with the lower surface .of the reflector 3 and are directed downward therefrom as indicated. It is observable that by means of this construction the rays of light that would escape by the mar inal ed s of the reflector 1 and be absor ed by t e approximate walls, are, instead, reflected downward from the reflector 3, thus throwing a much larger portion of the light downward. By this arran ment I am enabled in a comparativel smal space to arrange reflectors that wil secure a result that could only be secured in a' single reflector of very much larger size, which latter would necessarily cast a large shadow on the ceiling. One of the results of my device is the avoidance of such shadow to a large extent.

In a device of this kind however; as previously stated, in order to secure the most satisfactory results means should be provided for ad'usting the relative positions of the light an reflector.

The reflector 1 whether it forms an integral part of, or is connected to, the marginal portion 6, is provided with a suitable spider having arms 7, preferably three or GNOR OF FIVE-TWELF'I'I-IS TO FRANK AIRFIELD, AND FIVE-TWELFTHS TO more in number as indicated in Fig. 4, which at their inner ends, as at 8, are attached to the central fixture, which in the form shown serves for a connection to the supporting chain or cable 9. The outer ends of the arms 7, as at 10, are formed to permit the passage of a suitable bolt 11 therethrough, which bolt at one end passes through the reflector and is maintained in such position by a suitable head 12, and at the other end is pro vided with an adjusting nut 13. It is ob vious that by loosening or tightening the several nuts 13, carrying the reflectors, will raise or lower the same in relation to the light 4. The said bolts 11 also serve the purpose of securing the outer end of a suit able bracket or hanger 14, which, as shown in Fig, l, is bent inward as at 15 to embrace the inner edge of the reflector 3, and is thence bent downward, as at 16, to serve as a support for a suitable howl 17 partially surrounding the source of light. In the form shown, the supports 14 may be of wire or rods suitably formed for the purpose.

As shown in Figs. 2 and 3, instead of being a wire or rod, the support may be an ornamental bracket 18, which is suitably formed at a point to pass through an opening 19 in the reflector 3, shown in Fig. 3, and thence brought to position and secured by the bolt 11 substantially as before. In the form here shown the chain or cable 9 may be divided into strands and engaged directly with the adjusting rod 7 at suitable loops 20, or equivalent parts formed for that purpose.

As shown in Fig. 1, the reflectors are circular, although as I have previous] stated, they are not necessarily so. As s own in Fig. 5, the reflectors may be either circular or such other form as desired, and arranged for a plurality of lights 21 positioned within the reflecting device to secure the best results in the manner described. The direction of a part of the rays of light may be substantially as described, while the balance of the rays of light from that particular source may pass across the longer distance of the opening to the lower reflector, and passin above it ma either be permitted to pass diflectl upon t e ceiling and wall approximate t ereto, or if desired, upon the upper and main reflector which may be made sufficiently large relativel ,to secure substantially the same effect escribed, or a central reflector may be provided to prevent the escape of any rays of light between the margins of the reflectors as hereafter described.

As heretofore described, I have shown a fixture in which the reflecting device was ad justed relative to the li ht itself. In some instances, however, as w on the light fixture is placed directly upon the ceiling, it may not be convenient to adjust the reflecting device, and it may be more convenient to vertically adjust the lamp itself. Figs. 6, 7, 8 and 9 show such a structure. As clearly shown in Figs. 6, 7 and 8, the light or bulb is supported in a plate 22., carrying adjusting depending parts 23. The outer reflector may be secured thereto by suitable bolts 24, or equivalent means, the part 22 being preferably secured to an outlet box 25, which is fastened to the ceiling. The wires 26 pass through this box and form a proper connection with the socket for the bulb 27. This socket is clearly indicated in Fig. 7 by the numeral 28, and has secured thereto two or more spring extensions 29, provided with bends 30 or equivalent means, adapted to engage the regular indentations or corrugations 31 formed upon the inner surface of the depending parts 23. The spring is of sufficient strength and the corrugations are of sufficient depth to safely support a bulb, and the latter may be readily moved up or down by the pressure of the hand to adjust it in proper relative position to the duplex or double reflector as heretofore explained.

As shown in Fig. 9, I have illustrated a fixture adapted for use with several light units as in Fig. 5. This form, however, as indicated illustrates the use of such a device with a fixture to be secured to the ceiling and in which the light itself may be adjusted vertically a desired. The supplemental re flector in this form, which I have marked 32, is illustrated as being in outline some what clover leaf in form, as indicated at 33 and 34, that is to say, the lower reflector, and if desired the upper also, is constructed to form sections more or less concentric with the light bulb. This form secures very satisfactory results where a plurality of light bulbs are used, although as I have stated, the form of the reflectors may be modified as desired, care being taken, however, to secure the method of reflection of the rays of light substantially in the manner described.

The reflectors may be of such well known material as desired, and of such shade or color as is preferred for the purpose. The bowl also may be of such form and shade as is preferred. It .will be noted that in the preferred form shown, the bowl does not extend up as high as usual in relation to .the light unit, thus permitting the rays of light to pass over the mar in of the bowl as mdicated at h and i in ig. 1 and a: in Fig. 6. This effectively prevents the rays of light from directly striking the eye of a person below the light, but at the same time reflects the maximum amount of light downward.

It is obvious that my improvement may be employed to secure indirect, semi-direct or direct li hting effects as desired, dependin upon t e material and relative size and height of the bowl, or whether a bowl be used, if direct lighting is desired.

be readily constructed as connec- My device may a unitary device adapted for use in tion with a light fixture in place. Thus as shown in Fig. 10, the plural reflector device as described may be mounted upon and carried by a suitable collar 37, constructed to be sprung upon and secured to an ordinary lamp socket 38, a set screw 39 servin" to securely connect the collar in place. 'fhus my improved device may be said to be adapted for universal use as well in connection with light fixtures in place as when the entire device illustrated is employed.

As shown in Fig. 11, a further improvement is shown in the addition of a second supplemental reflector 40 centrally supported in a cluster of lights in such position that any rays of light 0, which would otherwise pass between the margins of the two reflectors 1 and 3. will contact with the reflector 40 and be directed thence back and down. instead of being absorbed by the surrounding wall.

Having thus described my invention, it is obvious that various modifications may be secured without departing from the spirit of my invention. hence I do not wish to be understood as limiting myself to the exact form or construction shown.

'hat I claim as new and desire to secure by Letters Patent is 1. In a device of the kind described, a main reflector, a supplemental reflector in combination with spacing means maintaining the supplemental reflector in spaced relation to the main reflector, said spacing members being extended and constructed to support a bowl.

2. In a device of the kind described, a main reflector. a supplemental reflector and spacing means arranged to maintain the two in spaced relation to one another in combination with supporting means for the reflector, adjustable connections between the supporting means and the main reflector whereby the position of the latter may be regulated as desired, and means for supporting the said reflector upon a light fixture.

3. A device of the kind described comprising a main reflector, a supplemental reflector and means for maintaining the two in spaced relation to one another in combination with supporting means and adjustable connections between the supporting means and the reflector, whereby the latter may be vertically adjusted, and an engagingeollar carried by the supporting means, whereby the collar may embrace and be supported by a light fixture.

4. In a device of the kind described, a main reflector and a supplemental reflector in combination with spacing means maintaining the supplemental reflector in spaced relation to the main reflector, a bowl partially inelosing the source of light, said spacing means being extended to and supporting the bowl in relation to the source of light, the bowl being so arranged that the rays of light passing over the upper edge thereof will contact with the supplemental reflector.

5. In a device of the kind described comprising a main reflector, a supplemental reflector maintained in spaced relation'to the main reflector with a central opening through which light may pass, in combination with a second supplemental reflector centrally positioned with relation to the main reflector, whereby when a cluster of light units are emplo ed surrounding salt second supplemental reflector, light rays that will tend to pass between the main reflector and the supplemental refl ctor at the margins thereof, will contacl with the central reflector and be thrown backward therefrom substantially as described.

In testimony whereof. I

' hereunto signed my name III the presence scribing witnesses.

PAUL A. BREDSVULI).

'Witnesses:

Jonx \V. HILL, CHARLES I. Conn. 

